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A212524
as a simple table
n
a(n)
1
3
2
17
3
108
4
755
5
5936
6
48474
7
406270
8
3532031
9
31295358
10
279591668
11
2521429242
12
22996137423
[3,17,108,755,5936,48474,406270,3532031,31295358, 279591668,2521429242,22996137423]